Kilroy was Here, The WW2 meme that helped win the war

"Kilroy was here," Long before the Internet made memes a staple of the modern world. A simple long-nosed character named Kilroy made his way around the globe the old-fashioned way, becoming a legend among the millions of military men and women who served during World War II.  

This episode is also available as a blog post: http://ignorantfacts.com/2021/11/07/kilroy-was-here/